Quantum entanglement can’t actually transmit information, it just looks like it can sometimes due to how quantum mechanics can get weird.
Get a red ball and a blue ball, and two boxes. Close your eyes and out one ball in each box. These box-balls are now “entangled”, in that you know that the contents of one is not the content of the other.
Send a box to a different country, and open yours. You instantly know that the other ball is red, since yours is blue, but the holder of the other box knows nothing new.
With the QM, it the same basic setup except both particles are in an indeterminate state, and when you look you’re making it “pick” which state it’s in, and it also makes the other one “pick”.
You can’t force it to collapse one way or the other without breaking the entanglement either, so it’d be like red-blue ball, and when you force it to be red, the other ball now has a 50/50 chance of also being red.
My guess for the only way to get some warning would be if the supernova had some form of initial, not-cataclysmic flash or outgassing shortly beforehand.
Quantum entanglement can’t actually transmit information, it just looks like it can sometimes due to how quantum mechanics can get weird.
Get a red ball and a blue ball, and two boxes. Close your eyes and out one ball in each box. These box-balls are now “entangled”, in that you know that the contents of one is not the content of the other.
Send a box to a different country, and open yours. You instantly know that the other ball is red, since yours is blue, but the holder of the other box knows nothing new.
With the QM, it the same basic setup except both particles are in an indeterminate state, and when you look you’re making it “pick” which state it’s in, and it also makes the other one “pick”.
You can’t force it to collapse one way or the other without breaking the entanglement either, so it’d be like red-blue ball, and when you force it to be red, the other ball now has a 50/50 chance of also being red.
My guess for the only way to get some warning would be if the supernova had some form of initial, not-cataclysmic flash or outgassing shortly beforehand.